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Loans and Allowance for Loan Losses - Industry Classification System (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Lessors of nonresidential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	$ 3,146,798
Unfunded Commitments	692,316
Total exposure	3,839,114	$ 3,483,597
Lessors of residential buildings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	983,084
Unfunded Commitments	269,344
Total exposure	1,252,428	1,151,676
Hotels (except for Casino Hotels) and Motels
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	760,355
Unfunded Commitments	157,315
Total exposure	917,670	836,320
236117 New Housing Operative Builders [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding Principal Balances	459,501
Unfunded Commitments	567,914
Total exposure	$ 1,027,415	$ 780,137

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- Definition

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- Definition

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- Definition

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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